求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8
求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8
求SINπ/64 COSπ/64 COSπ/32 COSπ/16 COSπ/8!急救急救
cos(π/32)*cos(π/16)*cos(π/8)=
8sin(π/32)cos(π/32)cos(π/16)cos(π/8),求值
cos sin π √
根号2sinπ/32*cosπ/32*cosπ/16*cosπ/18 怎么化简
θ∈(0,π/2),比较cosθ、sin(cosθ)、cos(sinθ)的大小
不用计算机求sinπ/8,cosπ/8
(cosπ/8+sinπ/8)(cos^3π/8-sin^3π/8)
(cos π/8+ sin π/8 ) (cos^3 π/8+sin^3 π/8 )的值.
已知向量m=(Cosθ,Sinθ)和n(根号2 -Sinθ,Cosθ),且Im+nl= 求Cos(θ/2+π/8)
已知cosa=1/4,求sin(2π+a)cos(-π+a)/cos(-a)tana